: How to batch resize canvas of multiple files placing the original pictures in the centers? I have got some hundreds of pictures of different shapes. For example one is 600x600, another is 307x600,

@Kimberly620

You can do this with actions & the batch automation feature within Photoshop. To accomplish a colored or transparent background with new size dimensions, you'd create an action set (folder icon) and create an action within that set for each color you're looking to batch.

Step 1: Create the action

Record yourself resizing the canvas for future automation


Navigate to the actions panel or Alt+F9
Create a new action by clicking the layer icon on the actions panel
Do the actions you want automated
Click the stop icon on the actions panel



While recording your specific action: (with image open)


Go to Image > Canvas Size and change to 610x610
Add a square shape for background
Change color of shape to desired color / make no background for transparent
Move beneath your image


Repeat this, creating a new color action within your action set as desired


Step 2: Setting up a batch automation

Tell Photoshop which folder of images to apply your re-sizing action to


Go to File > Automate > Batch
'Play' section, choose your newly created action
'Source' section, choose a folder of images to apply this action to
'Destination' section, choose a folder where the newly re-sized images should output.
Click Ok and your automation will begin immediately.



Side Notes:


Changing the canvas size will center image within the new dimensions.
Custom actions record the things you do in Photoshop, in this case re-sizing.
'Action Sets' in the batch dialog are folders or groups of actions in the actions panel.

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@Samaraweera207

I have received a perfect answer at another (non-English) site, let me publish it here for those who may have the same question in future.

mogrify -extent 640x640 -gravity Center -fill white *.jpg


(the mogrify command is a part of ImageMagick)

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